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The IMA SDK must be able to tell when ads are visible to users so that it can send the correct signals back to the ad server. IMA uses Active View reporting to measure the viewability of ads. This guide explains how Active View reporting works with IMA, as well as how to verify that the SDK is able to correctly capture viewability signals.
How Active View reporting works with the IMA SDK
The publisher designates a container element when creating the AdDisplayContainer.
As long as the AdDisplayContainer is viewable and unobstructed when the AdsRequest is made, Active View receives measurements on that container.
Verifying that the SDK can measure ad viewability
To check whether that the SDK is able to capture viewability signals, look for network requests sent to https://pagead2.googlesyndication.com/pcs/activeview and check for the mtos parameter. For more information, see Monitor Active View measurement.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThe IMA SDK uses Active View reporting to measure ad viewability and send signals to the ad server.\u003c/p\u003e\n"],["\u003cp\u003ePublishers designate a container element for Active View to measure, ensuring it's viewable when requesting ads.\u003c/p\u003e\n"],["\u003cp\u003eVerifying viewability involves checking for specific parameters in HTTP requests, indicating successful measurement.\u003c/p\u003e\n"],["\u003cp\u003eCustom video display setups might need layout adjustments for accurate viewability metrics, with support available via the IMA forum.\u003c/p\u003e\n"]]],[],null,["The IMA SDK must be able to tell when ads are visible to users so that it can\nsend the correct signals back to the ad server. IMA uses\n[Active View reporting](//support.google.com/admanager/answer/3154105)\nto measure the viewability of ads. This guide explains how Active View\nreporting works with IMA, as well as how to verify that the SDK is able to\ncorrectly capture viewability signals.\n\nHow Active View reporting works with the IMA SDK\n\n1. The publisher designates a container element when creating the\n [`AdDisplayContainer`](/interactive-media-ads/docs/sdks/html5/client-side/reference/js/google.ima.AdDisplayContainer).\n\n2. As long as the `AdDisplayContainer` is viewable and unobstructed when the\n [`AdsRequest`](/interactive-media-ads/docs/sdks/html5/client-side/reference/js/google.ima.AdsRequest)\n is made, Active View receives measurements on that container.\n\nVerifying that the SDK can measure ad viewability\n\nTo check whether that the SDK is able to capture viewability signals, look for\nnetwork requests sent to `https://pagead2.googlesyndication.com/pcs/activeview`\nand check for the `mtos` parameter. For more information, see\n[Monitor Active View measurement](//support.google.com/admanager/answer/6123557).\n| **Note:** If you use your own video display and maintain full control over playback, you might need to modify your layout to ensure that the necessary metrics are being correctly returned. For additional assitance, reach out to us on the [IMA support forum](//groups.google.com/g/ima-sdk)."]]